CN106907647A - A kind of LED motor vehicle headlight heat pipe and its preparation process - Google Patents

Abstract

The invention discloses an LED (light emitting diode) motor vehicle headlamp heat conduction pipe which comprises a pipe shell, wherein the pipe shell is provided with an evaporation section, a heat insulation section and a condensation section, a first channel cavity is arranged in the evaporation section, a second channel cavity is arranged in the heat insulation section, the condensation section is provided with a condensation cavity, the first channel cavity, the second channel cavity and the condensation cavity are all vacuum cavities and are filled with condensate, the cross section area of the first channel cavity is consistent with that of the second channel cavity, and the cross section area of the condensation cavity is larger than that of the first channel cavity or the second channel cavity. On the other hand, the invention also provides a preparation process of the LED motor vehicle headlamp heat conduction pipe. In the invention, the high-heat gas enters the relatively loose condensation cavity from the relatively narrow first channel cavity and the relatively narrow second channel cavity in sequence, and the condensation cavity with larger volume slows down the flow velocity of the high-heat gas, namely more high-heat gas stays in the condensation cavity for heat dissipation, thereby effectively improving the heat dissipation efficiency.

Description

A kind of LED motor vehicle headlight heat pipe and its preparation process

technical field

The invention relates to the technical field of heat conduction, in particular to a heat conduction tube of an LED motor vehicle headlight and a preparation process thereof.

Background technique

Since G.M.Grver of the Los Alamos National Laboratory in the United States invented the "heat pipe" in 1963, it was not until recent years that LED car headlights gradually introduced "heat pipe" technology as a heat dissipation component. The heat pipe manufacturing technology has long been mature and common. At present, the far and near lighting type of automobile headlights is based on the reflector cup designed with the inner diameter of 2-3mm tungsten wire light emitting angle as the standard. This special requirement makes all the heat pipes of LED lamps used in automobile headlights be a whole piece Flat and elongated copper tubes with a thickness of less than 3mm, and the heat transfer tubes of LED car headlights on the market are all made of flat or T-shaped. Due to the small volume of the flat or T-shaped condensation section, it cannot effectively release heat. Therefore, the lamp beads of the car headlights are often above 230°C, resulting in very low heat dissipation efficiency.

Contents of the invention

In order to overcome the deficiencies in the prior art, the object of the present invention is to provide a heat pipe for LED motor vehicle headlights and its preparation process. Since the first channel cavity is formed in the evaporation section and the second channel cavity is formed in the heat insulation section, A condensation cavity is formed in the condensation section, and the cross-sectional area of the condensation cavity is larger than that of the first channel cavity or the second channel cavity, and the high-heat gas enters the relatively loose condensation cavity from the relatively narrow first channel cavity and the second channel cavity in sequence , The larger volume of the condensation chamber slows down the flow rate of the high-heat gas, so that more high-heat gas stays in the condensation chamber and dissipates heat, which can effectively improve the heat dissipation efficiency. The invention can solve the problem that the heat dissipation efficiency of the flat or T-shaped heat pipe is very low.

The object of the present invention adopts following technical scheme to realize:

A heat-conducting tube for an LED motor vehicle headlight, comprising a tube shell, the tube shell is provided with an evaporation section, an adiabatic section and a condensation section, the evaporation section is provided with a first passage cavity, the adiabatic section is provided with a second passage chamber, and the condensation section There is a condensation chamber inside, and the first passage chamber, the second passage chamber and the condensation chamber are fluidly connected in sequence, and the first passage chamber, the second passage chamber and the condensation chamber are all vacuum chambers and filled with condensate,

The cross-sectional area of the first channel cavity is consistent with the cross-sectional area of the second channel cavity, and the cross-sectional area of the condensation cavity is larger than the cross-sectional area of the first channel cavity or the second channel cavity.

Preferably, capillary core layers are all provided on the inner cavity walls of the first channel cavity, the second channel cavity and the condensation cavity.

Preferably, the cross-sections of the first channel chamber and the second channel chamber are rectangular, and the cross-section of the condensation chamber is circular, oval or polygonal.

Preferably, the width of the rectangular cross-section is 1.4 mm, and the diameter of the circular cross-section is greater than 4.50 mm, or the semi-minor axis of the elliptical cross-section is greater than 2.25 mm.

Preferably, the thickness of the shell wall is 0.3mm-1mm.

Preferably, the evaporating section, the adiabatic section and the condensing section are integrally formed,

Or, the adiabatic section and the condensing section are fixed together by welding,

Alternatively, the tube shell includes a first sheet structure and a second sheet structure, and the first sheet structure and the second sheet structure are fixed together by welding to form the evaporation section, the heat insulation section and the condensation section.

Preferably, the thickness of the evaporating section and the heat insulating section in the shell is less than or equal to 3mm, and the thickness of the condensing section in the shell is greater than 4.5mm.

A kind of preparation technology of LED motor vehicle headlight heat pipe,

1) Select the first copper tube, shrink and seal one end of the first copper tube, wherein the first copper tube includes an evaporation section, an adiabatic section and a condensation section,

2) inserting a sintered mandrel made of stainless steel into the first copper tube and fixing it so that a gap is formed between the outer surface of the sintered mandrel and the inner wall of the first copper tube,

3) Mix copper powder and industrial salt to obtain powder A, or mix copper powder and industrial salt and alumina fiber to obtain powder B, and use a vibrating machine to pour powder A or powder B into the gap,

4) Add nitrogen, repeat sintering at a temperature of 940°C to 960°C, so that the first channel cavity of the evaporation section, the second channel cavity of the adiabatic section, and the inner cavity wall of the condensation cavity of the condensation section are all formed with a capillary core layer ,

5) Add condensate to the other end of the first copper pipe, and then carry out vacuum treatment on the first channel cavity, the second channel cavity and the condensation cavity, so that the first channel cavity, the second channel cavity and the condensation cavity become vacuum chambers, and then the The other end of the first copper pipe is sealed.

A kind of preparation technology of LED motor vehicle headlight heat pipe,

1) Select the second copper tube, shrink and seal one end of the second copper tube, wherein the second copper tube includes an evaporation section and an adiabatic section,

2) Select the third copper tube, the third copper tube is the condensation section, weld the other end of the second copper tube and the third copper tube together,

3) inserting the sintered mandrel made of stainless steel into the third copper tube and the second copper tube in sequence and fixing it so that a gap is formed between the outer surface of the sintered mandrel and the inner wall of the third copper tube and the second copper tube,

4) Mix copper powder and industrial salt to obtain powder C, or mix copper powder and industrial salt and alumina fiber to obtain powder D, and use a vibration machine to pour powder C or powder D into the gap,

5) Add nitrogen, repeat sintering at a temperature of 940°C to 960°C, so that the inner cavity walls of the first channel cavity of the evaporation section, the second channel cavity of the adiabatic section, and the condensation cavity of the condensation section are all formed with a capillary core layer ,

6) Add condensate to the other end of the third copper pipe, and then carry out vacuum treatment on the first channel cavity, the second channel cavity and the condensation cavity, so that the first channel cavity, the second channel cavity and the condensation cavity become vacuum chambers, and then the Carry out sealing treatment at the other end of the third copper pipe.

A kind of preparation technology of LED motor vehicle headlight heat pipe,

1) Selecting the first sheet structure and the second sheet structure obtained by stamping,

2) Match the corresponding first jig on the upper surface of the first sheet structure and fix it so that a first gap layer is formed between the upper surface of the first sheet structure and the first jig, and the upper surface of the second sheet structure matching and fixing the corresponding second jig so that a second gap layer is formed between the upper surface of the second sheet structure and the second jig,

3) Mix copper powder and industrial salt to obtain powder E, or mix copper powder and industrial salt and alumina fiber to obtain powder F, and use a vibrating machine to pour powder E or powder F into the first void layer and the second void layer,

4) adding nitrogen, and repeatedly sintering at a temperature of 940 ° C to 960 ° C, so that the upper surface of the first sheet structure and the upper surface of the second sheet structure are formed with a capillary core layer,

5) Welding the two sides of the first sheet structure and the two sides of the second sheet correspondingly, so that the first sheet structure and the second sheet form a fourth copper tube including an evaporation section, an adiabatic section and a condensation section,

6) Add the condensate into the fourth copper tube, and then perform vacuum treatment on the fourth copper tube, so that the inside of the fourth copper tube becomes a vacuum cavity, and then perform sealing treatment on the fourth copper tube.

Compared with the prior art, the beneficial effect of the present invention is that: since the first channel cavity is formed in the evaporation section, the second channel cavity is formed in the heat insulation section, and the condensation cavity is formed in the condensation section, the first channel cavity, the second channel cavity The cavity and the condensing cavity are both vacuum cavities and filled with condensate, and the cross-sectional area of the condensing cavity is larger than the cross-sectional area of the first channel cavity or the second channel cavity. The high-heat gas is generated in the middle, and the high-heat gas quickly enters the loose condensation chamber from the narrow first channel chamber and the second passage chamber in turn. The larger volume condensation chamber slows down the flow rate of the high-heat gas, that is, more high-heat gas stays in the condensation chamber. , while the external heat dissipation system of the condensation section absorbs the heat of the high-heat gas, and the high-heat gas (water vapor) converts the gas phase into a liquid phase when it is cooled. Due to the larger volume of the condensation chamber, the high-heat gas (water vapor) can be faster in the condensation chamber The ground is converted from the gas phase to the liquid phase, that is, the water vapor is converted into a liquid, and then attached to the capillary core layer, and then flows from the condensation section along the capillary core layer back to the evaporation section, which can effectively improve the heat dissipation efficiency. The invention can solve the problem that the heat dissipation efficiency of the flat or T-shaped heat pipe is very low.

Description of drawings

Fig. 1 is the structural representation of an embodiment of the LED motor vehicle headlight heat pipe of the present invention;

Fig. 2 is the structural representation of another embodiment of the LED motor vehicle headlight heat pipe of the present invention;

Fig. 3 is the schematic structural view of the evaporation section and the heat insulation section in the heat pipe of the LED motor vehicle headlight shown in Fig. 2;

Fig. 4 is a structural schematic diagram of the condensation section in the heat pipe of the LED motor vehicle headlight shown in Fig. 2;

FIG. 5 is a schematic cross-sectional structure diagram of the heat pipe of the LED motor vehicle headlight shown in FIG. 2 .

In the figure: 11, evaporation section; 12, adiabatic section; 13, condensation section.

detailed description

Below, in conjunction with accompanying drawing and specific embodiment, the present invention is described further:

Please refer to FIG. 1-FIG. 5 , the present invention relates to a heat pipe for LED motor vehicle headlights, which includes a tube shell, and the tube shell is provided with an evaporation section 11 , an adiabatic section 12 and a condensation section 13 .

The evaporating section 11 is a flat tubular structure, wherein the thickness of the evaporating section 11 in the shell is 3 mm (that is, the distance between the two sides corresponding to the outer surface of the shell of the evaporating section 11 in the shell is 3 mm), and the evaporating section in the shell 11 has a housing wall thickness of 0.3 mm.

In this embodiment, the thickness of the evaporation section 11 in the shell is 3mm. In other embodiments, the thickness of the evaporating section 11 in the shell can be changed according to actual conditions, for example, the thickness of the evaporating section 11 in the shell can be 2.4mm, 2.5mm or 2.8mm, as long as the thickness of the evaporating section 11 in the shell is guaranteed. The thickness is less than or equal to 3mm.

In this embodiment, the shell wall thickness of the evaporation section 11 in the shell is 0.3 mm. In other embodiments, the shell wall thickness of the evaporating section 11 in the tube shell can be changed according to actual conditions, for example, the shell wall thickness of the evaporating section 11 in the tube shell can be 0.4mm, 0.5mm or 1mm, as long as the shell The shell wall thickness of the middle evaporation section 11 may be 0.3mm-1mm.

The heat insulation section 12 is a flat tubular structure, wherein the thickness of the heat insulation section 12 in the shell is 3mm, that is, the distance between the two sides of the outer surface of the heat insulation section 12 in the shell is 3mm, and the heat insulation section 12 in the shell The shell wall thickness is 0.3mm.

In this embodiment, the thickness of the heat insulating section 12 in the shell is 3mm. In other embodiments, the thickness of the heat insulating section 12 in the shell can be changed according to actual conditions, for example, the thickness of the heat insulating section 12 in the shell can be 2.4mm, 2.5mm or 2.8mm, as long as the thickness of the heat insulating section 12 in the shell is guaranteed The thickness is less than or equal to 3mm.

In this embodiment, the shell wall thickness of the heat insulating section 12 in the tube shell is 0.3 mm. In other embodiments, the shell wall thickness of the heat insulating section 12 in the shell can be changed according to the actual situation, for example, the shell wall thickness of the heat insulating section 12 in the shell can be 0.4mm, 0.5mm or 1mm, as long as the shell is guaranteed The shell wall thickness of the middle insulation section 12 may be 0.3mm-1mm.

The condensing section 13 is a circular tubular structure, wherein the thickness of the condensing section 13 in the shell is 8 mm, that is, the distance between the corresponding two sides of the outer surface of the condensing section 13 in the shell is 8 mm, and the shell of the condensing section 13 in the shell The body wall thickness is 0.3 mm.

In this embodiment, the thickness of the condensation section 13 in the shell is 8 mm. In other embodiments, the thickness of the condensation section 13 in the shell can be changed according to actual conditions, for example, the thickness of the condensation section 13 in the shell can be 8.8mm or 10mm.

In this embodiment, the shell wall thickness of the condensation section 13 in the tube shell is 0.3mm. In other embodiments, the shell wall thickness of the condensing section 13 in the tube shell can be changed according to actual conditions, for example, the shell wall thickness of the condensing section 13 in the tube shell can be 0.4mm, 0.5mm or 1mm, as long as the tube shell The thickness of the middle condensation section 13 is 0.3mm-1mm.

A first channel cavity is formed in the evaporating section 11, a second channel cavity is formed in the adiabatic section 12, and a condensation cavity is formed in the condensation section 13, wherein the first channel cavity, the second channel cavity and the condensation cavity are fluidly connected in sequence. The cross-sections of the first channel cavity and the second channel cavity are all rectangular (the cross-section of the first channel cavity refers to the cross-section of the inner wall of the evaporation section 11, and the cross-section of the second channel cavity refers to the cross-section of the inner wall of the adiabatic section 12), the condensation chamber The cross-section is circular or oval (the cross-section of the condensation cavity refers to the cross-section of the inner wall of the condensation section 13), the cross-sectional area of the first channel cavity is consistent with the cross-sectional area of the second channel cavity, and the cross-sectional area of the condensation cavity is larger than that of the first channel Cavity or second channel cavity cross-sectional area. Wherein the width of the rectangular cross-section in the first channel cavity and the second channel cavity is 1.4 mm, the diameter of the circular cross-section in the condensation cavity is greater than 4.50 mm, or the short diameter of the oval cross-section in the condensation cavity The semi-axis is greater than 2.25mm.

In this embodiment, the cross section of the condensation cavity is circular. In other embodiments, the cross section of the condensation cavity may be polygonal.

In this embodiment, the width of the rectangular cross-sections in the first channel cavity and the second channel cavity is 1.4 mm. In other embodiments, the width of the rectangular cross section can be changed according to actual conditions, for example, the width of the rectangular cross section can be 1.5mm or 1.6mm.

The evaporating section 11, the adiabatic section 12 and the condensing section 13 are integrally formed; or, the evaporating section 11 and the adiabatic section 12 are integrally formed, and the adiabatic section 12 and the condensing section 13 are fixed together by welding; Alternatively, the tube shell includes a first sheet structure and a second sheet structure, wherein both the first sheet structure and the second sheet structure are obtained by stamping, and the gap between the first sheet structure and the second sheet structure is Fix together by welding, thereby forming described evaporating section 11, adiabatic section 12 and condensing section 13 (that is, the first channel chamber and adiabatic section of evaporating section 11 are formed between the first sheet-like structure and the second sheet-like structure 12 of the second channel chamber and the condensation chamber of the condensation section 13). The length of the shell formed by the evaporating section 11, the heat insulating section 12 and the condensing section 13 can be designed according to the actual situation.

And the first passage chamber, the second passage chamber and the condensation chamber are all vacuum chambers, and the first passage chamber, the second passage chamber and the condensation chamber are filled with condensate (condensate is ionized water), the first passage chamber, the second passage chamber Capillary core layers are formed on the inner wall of the two-channel cavity and the condensation cavity. During the working process of the motor vehicle headlights, the heat source of the LED lamp bead causes the ionized water in the evaporation section 11 to evaporate, thus forming a high-heat gas (water vapor), and the high-heat gas (water vapor) sequentially flows from the narrow first channel cavity and the second narrow passage cavity. The two-channel chamber quickly enters the loose condensation chamber, and the larger volume of the condensation chamber slows down the flow rate of the high-heat gas, that is, more high-heat gas stays in the condensation chamber, while the external heat dissipation system of the condensation section 13 absorbs the heat of the high-heat gas, and the high-heat gas (Water vapor) converts the gas phase into a liquid phase when it is cold. Because the volume of the condensation chamber is larger, the high-heat gas (water vapor) can be converted from the gas phase to the liquid phase faster in the condensation chamber, that is, the water vapor is converted into a liquid, and then The cavity wall of the attached condensation chamber enters the capillary core layer, and flows from the condensation section 13 along the capillary core layer to the evaporation section 11, that is, after the water vapor is converted into a liquid, it adheres into the capillary core layer under the action of the capillary force of the capillary core layer, Then, it flows from the condensing section 13 back to the evaporating section 11 along the capillary layer, which can effectively improve the heat dissipation efficiency.

Another aspect in the present invention also provides a kind of preparation technology of this kind of LED motor vehicle headlight heat pipe:

1) Select the first copper tube, shrink and seal one end of the first copper tube, wherein the first copper tube includes an evaporation section 11, an adiabatic section 12 and a condensation section 13,

2) inserting a sintered mandrel made of stainless steel into the first copper tube and fixing it so that a gap is formed between the outer surface of the sintered mandrel and the inner wall of the first copper tube,

3) Mixing copper powder and industrial salt to obtain powder A, or mixing copper powder and industrial salt and alumina fiber to obtain powder B, using a vibrating machine to pour powder A or powder B into the gap,

4) Adding nitrogen gas, repeated sintering at a temperature of 940° C. to 960° C., so that the first channel cavity of the evaporation section 11, the second channel cavity of the adiabatic section 12, and the inner cavity wall of the condensation cavity of the condensation section 13 were uniform. Formed with a capillary core,

5) Add condensate at the other end of the first copper tube, and then carry out vacuum treatment on the first channel cavity, the second channel cavity and the condensation cavity, so that the first channel cavity, the second channel cavity and the condensation cavity become vacuum chambers ( In order to further increase the vacuum degree of the first channel cavity, the second channel cavity and the condensation cavity, the residual air in the first copper tube must be degassed for the second time, that is, the evaporation section 11 is heated so that the water vapor will remove the residual air from the first copper tube One end of the first copper tube is squeezed to the other end, and then discharged to the outside of the tube), and then the other end of the first copper tube is sealed to complete the production of the heat pipe.

On the other hand in the present invention, also provide another kind of preparation technology of this a kind of LED motor vehicle headlight heat pipe:

1) Select the second copper tube, and shrink and seal one end of the second copper tube, wherein the second copper tube includes an evaporation section 11 and an adiabatic section 12,

2) select the third copper pipe, the third copper pipe is the condensation section 13, weld the other end of the second copper pipe and the third copper pipe together,

3) inserting the sintered mandrel made of stainless steel into the third copper tube and the second copper tube in sequence and fixing it so that a gap is formed between the outer surface of the sintered mandrel and the inner wall of the third copper tube and the second copper tube,

4) Mix copper powder and industrial salt to obtain powder C, or mix copper powder and industrial salt and alumina fiber to obtain powder D, and use a vibrating machine to pour powder C or powder D into the gap,

5) Nitrogen is added, and the sintering is repeated at a temperature of 940° C. to 960° C., so that the first channel cavity of the evaporation section 11, the second channel cavity of the adiabatic section 12, and the inner cavity wall of the condensation cavity of the condensation section 13 are uniform. Formed with a capillary core,

6) Add condensate at the other end of the third copper pipe, and then carry out vacuum treatment to the first channel cavity, the second channel cavity and the condensation cavity, so that the first channel cavity, the second channel cavity and the condensation cavity become vacuum chambers ( In order to further increase the vacuum degree of the first channel cavity, the second channel cavity and the condensation cavity, the residual air in the second copper tube and the third copper tube must be degassed twice, that is, the evaporation section 11 is heated so that the water vapor will remove the residual air Squeeze from one end of the second copper tube to the other end of the third copper tube, and then discharge to the outside of the tube), and then seal the other end of the third copper tube to complete the production of the heat pipe.

On the other hand in the present invention, also provide the 3rd kind of preparation technology of this a kind of LED motor vehicle headlight heat pipe:

1) Selecting the first sheet structure and the second sheet structure obtained by stamping,

2) matching the corresponding first jig on the upper surface of the first sheet structure and fixing it so that a first gap layer is formed between the upper surface of the first sheet structure and the first jig; The upper surface of the sheet-like structure is matched with the corresponding second jig and fixed, so that a second gap layer is formed between the upper surface of the second sheet-like structure and the second jig,

3) Copper powder and industrial salt are mixed to obtain powder E, or copper powder is mixed with industrial salt and alumina fibers to obtain powder F, and powder E or powder F is poured into the first void layer and second interstitial layer,

4) adding nitrogen, and repeatedly sintering at a temperature of 940 ° C to 960 ° C, so that the upper surface of the first sheet structure and the upper surface of the second sheet structure are formed with a capillary core layer,

5) The two sides of the first sheet structure and the two sides of the second sheet are correspondingly welded together, so that the first sheet structure and the second sheet constitute the fourth copper that includes the evaporation section 11, the heat insulation section 12 and the condensation section 13 Tube,

6) Add condensate into the fourth copper tube, and then carry out vacuum treatment on the fourth copper tube, so that the inside of the fourth copper tube becomes a vacuum cavity (in order to further improve the vacuum degree of the first channel cavity, the second channel cavity and the condensation cavity , the residual air in the four copper tubes must be degassed for the second time, that is, heating the evaporation section 11 so that the water vapor squeezes the residual air from one end of the four copper tubes to the other end, and then discharged to the outside of the tube), and then in the fourth The copper tube is sealed to complete the production of the heat pipe.

When using the present invention, since the first channel cavity is formed in the evaporation section 11, the second channel cavity is formed in the heat insulation section 12, and the condensation cavity is formed in the condensation section 13, wherein the first channel cavity, the second channel cavity and the condensation cavity The fluid is connected in turn, and the first channel cavity, the second channel cavity and the condensation cavity are all vacuum chambers, and the first channel cavity, the second channel cavity and the condensation cavity are filled with condensate (the condensate is ionized water), the first A capillary core layer is formed on the inner cavity wall of the channel cavity, the second channel cavity and the condensation cavity, and the cross-sectional area of the condensation cavity is greater than the cross-sectional area of the first channel cavity or the second channel cavity. In the process, the LED lamp bead heat source evaporates the ionized water in the evaporation section 11, thereby generating high-heat gas (water vapor), and the high-heat gas (water vapor) rapidly enters the loose condensation chamber from the narrow first channel cavity and the second channel cavity sequentially. In the cavity, the condensation chamber with a larger volume slows down the flow rate of the high-heat gas, that is, more high-heat gas stays in the condensation chamber, and the external heat dissipation system of the condensation section 13 absorbs the heat of the high-heat gas, and the high-heat gas (water vapor) is cooled. Converted to liquid phase, due to the larger volume of the condensation chamber, the high-heat gas (water vapor) can be converted from gas phase to liquid phase faster in the condensation chamber, that is, water vapor is converted into liquid, and then attached to the capillary core layer, and then From the condensation section 13, it flows back to the evaporation section 11 along the capillary layer, that is, after the water vapor is converted into a liquid, it adheres to the capillary layer under the action of the capillary force of the capillary layer, and then flows back to the evaporation section from the condensation section 13 along the capillary layer. The reuse in section 11 can effectively improve the heat dissipation efficiency. The invention can solve the problem that the heat dissipation efficiency of the flat or T-shaped heat pipe is very low. Another aspect of the present invention also provides a preparation process of the LED motor vehicle headlight heat pipe.

Those skilled in the art can make various other corresponding changes and deformations according to the above-described technical solutions and concepts, and all these changes and deformations should fall within the protection scope of the claims of the present invention.

Claims (10)

1. a kind of LED front headlight of motor vehicle heat conducting pipe, it is characterised in that including shell, the shell is provided with evaporator section, adiabatic section And condensation segment, first passage chamber is provided with the evaporator section, second channel chamber is provided with the adiabatic section, set in the condensation segment There is condensation chamber, the first passage chamber, second channel chamber and condensation chamber are in fluid communication successively, and the first passage chamber, Two channel lumens and condensation chamber are vacuum chamber and fill condensate liquid,

First passage chamber cross-sectional area is consistent with second channel chamber cross-sectional area, condensation chamber cross section face Product is more than the first passage chamber or second channel chamber cross-sectional area.

2. LED front headlight of motor vehicle heat conducting pipe according to claim 1, it is characterised in that the first passage chamber, second Wick layer is equipped with the internal chamber wall of channel lumens and condensation chamber.

3. LED front headlight of motor vehicle heat conducting pipe according to claim 1, it is characterised in that the first passage chamber, second The cross section of channel lumens is rectangle, the condensation chamber circular in cross-section, oval or polygon.

4. LED front headlight of motor vehicle heat conducting pipe according to claim 3, it is characterised in that it is described be rectangle it is transversal The width in face be 1.4mm, the rounded cross section with diameter greater than 4.50mm, or, the cross section of the ovalize Semi-minor axis be more than 2.25mm.

5. LED front headlight of motor vehicle heat conducting pipe according to claim 1, it is characterised in that the thickness of the shell wall is 0.3mm-1mm。

6. LED front headlight of motor vehicle heat conducting pipe according to claim 1, it is characterised in that the evaporator section, adiabatic section and Condensation segment is formed in one structure,

Or, it is fixed together by way of welding between the adiabatic section and condensation segment,

Or, the shell includes the first laminated structure and the second laminated structure, first laminated structure and the second sheet knot It is fixed together by welding between structure, so as to form the evaporator section, adiabatic section and condensation segment.

7. LED front headlight of motor vehicle heat conducting pipes according to any one of claim 1-6, it is characterised in that the shell The thickness of middle evaporator section and adiabatic section is less than or equal to 3mm, and the thickness of condensation segment is more than 4.5mm in the shell.

8. a kind of preparation technology of LED front headlight of motor vehicle heat conducting pipe, it is characterised in that

1) the first copper pipe is chosen, first copper pipe one end is carried out into undergauge sealing treatment, wherein the first copper pipe includes evaporator section, thermal insulation Section and condensation segment,

2) the sintering plug being made stainless steel is inserted in the first copper pipe and is fixed so that sintering plug outer surface and first Gap is formed between copper pipe inwall,

3) copper powder and Nacl are carried out being mixed to get powders A, or, copper powder and Nacl and alumina fibre are mixed Powder B is obtained, powders A or powder B is poured into the gap using vibrating machine,

4) nitrogen is added, is sintered repeatedly at a temperature of 940 DEG C~960 DEG C so that the first passage chamber of the evaporator section, thermal insulation Wick layer is formed on the internal chamber wall of the second channel chamber of section and the condensation chamber of condensation segment,

5) condensate liquid is added in the first copper pipe other end, then first passage chamber, second channel chamber and condensation chamber is carried out at vacuum Reason so that the first passage chamber, second channel chamber and condensation chamber turn into vacuum chamber, are then sealed to the first copper pipe other end Mouth treatment.

9. a kind of preparation technology of LED front headlight of motor vehicle heat conducting pipe, it is characterised in that

1) the second copper pipe is chosen, second copper pipe one end is carried out into undergauge sealing treatment, wherein the second copper pipe is comprising evaporator section and absolutely Hot arc,

2) the 3rd copper pipe is chosen, the 3rd copper pipe is condensation segment, and the second copper pipe other end and the 3rd copper pipe are welded together,

3) the sintering plug being made stainless steel is sequentially inserted into the 3rd copper pipe and the second copper pipe and is fixed so that sintering core Gap is formed between rod outer surface and the 3rd copper pipe and the inwall of the second copper pipe,

4) copper powder and Nacl are carried out being mixed to get powder C, or, copper powder and Nacl and alumina fibre are mixed Powder D is obtained, powder C or powder D is poured into the gap using vibrating machine,

5) nitrogen is added, is sintered repeatedly at a temperature of 940 DEG C~960 DEG C so that the first passage chamber of the evaporator section, thermal insulation Wick layer is formed on the internal chamber wall of the second channel chamber of section and the condensation chamber of condensation segment,

6) condensate liquid is added in the 3rd copper pipe other end, then first passage chamber, second channel chamber and condensation chamber is carried out at vacuum Reason so that the first passage chamber, second channel chamber and condensation chamber turn into vacuum chamber, then to being carried out in the 3rd copper pipe other end Sealing treatment.

10. a kind of preparation technology of LED front headlight of motor vehicle heat conducting pipe, it is characterised in that

1) the first laminated structure and the second laminated structure that punch forming is obtained are chosen,

2) match corresponding first tool in the first laminated structure upper surface and be fixed so that in the first laminated structure The first void layer is formed between surface and the first tool, corresponding second tool is matched simultaneously in the second laminated structure upper surface It is fixed so that Second gap layer is formed between the second laminated structure upper surface and the second tool,

3) copper powder and Nacl are carried out being mixed to get powder E, or, copper powder and Nacl and alumina fibre are mixed Powder F is obtained, powder E or powder F is poured into first void layer and Second gap layer using vibrating machine,

4) nitrogen is added, is sintered repeatedly at a temperature of 940 DEG C~960 DEG C so that the first laminated structure upper surface and second Shape structure upper surface forms wick layer,

5) weld together the first laminated structure both sides are corresponding with the second sheet both sides so that the first laminated structure and second Shape constitutes the 4th copper pipe comprising evaporator section, adiabatic section and condensation segment,

6) condensate liquid is added in the 4th copper pipe, then application of vacuum is carried out to the 4th copper pipe so that turn into vacuum in the 4th copper pipe Chamber, then to carrying out sealing treatment in the 4th copper pipe.